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Polymarket odds of a U.S.-Iran ceasefire by Aug. 31, 2026 slip to 70%

Polymarket odds of a U.S.-Iran ceasefire by Aug. 31, 2026 slip to 70%

Oil fell as Reuters reported Iran would halt attacks if the U.S. holds fire, while Polymarket traders cut implied ceasefire odds from 75% to 70% amid a pause in hostilities.

Fact Check
CNBC confirms oil fell sharply on a Reuters report that Iran would halt attacks if the U.S. maintains its pause, matching the oil-and-Reuters portion of the claim. Odaily (2026-07-26) reports the Polymarket ceasefire-by-Aug-31 probability at 75%, and CoinNess (2026-07-27) reports it at 70%; together they confirm the stated 75%->70% slip across the pause in hostilities. The Polymarket event page confirms real markets tracked U.S.-Iran ceasefire dates. All primary elements are corroborated by dated sources, so the claim is likely true.
Summary

Polymarket data shows traders assigning a 70% probability that the United States and Iran will reach a ceasefire agreement by Aug. 31, 2026, down from an earlier 75% reading. The move came as oil prices dropped after Reuters, citing a senior Iranian official, reported that Tehran would suspend attacks if the United States refrains from striking, following Washington's pause in its bombing campaign. Brent crude for September delivery fell 4.88% to around $92 a barrel and U.S. West Texas Intermediate for September delivery slid more than 5% to $84.84, reflecting reduced near-term fears of energy-market disruption.

Terms & Concepts
  • Polymarket: A prediction market platform for trading event outcomes.
  • prediction market: A market where traders buy and sell contracts tied to future event probabilities.
  • Brent crude: Global benchmark for oil prices.